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Solution


Q.

The two versions of a trait which are brought in by the male and female gametes are situated on:
1 Copies of the same chromosome  
2 Two different chromosomes  
3 Sex chromosomes  
4 Any chromosomes  

Ans.

(1)

On different copies of the same chromosome, different alleles are present. One chromosome is inherited from the father via the male gamete, while the other chromosome is inherited from the mother via the female gamete. After fertilisation, a zygote with 23 pairs of chromosomes is created, with alleles for a trait present on the homologous pair.